Résumé / Abstract Journal-club_Univers

Journal-club Univers / Journal-club Universe

« New measurement of anisotropies in the gamma-ray sky and their dark matter interpretation »

Jennifer Gaskins
GRAPPA Inst., Gravitation AstroParticle Physics Amsterdam (Amsterdam, Pays-Bas)

Gamma rays probe the most energetic processes in the universe and are a promising tool to search for signatures of new physics. One outstanding mystery in high-energy astrophysics is the origin of the diffuse gamma-ray background, which is thought to arise from the collective emission of sources too faint to be detected individually. The clustering of sources imprints small-scale anisotropies in the gamma-ray background, which may provide a means of identifying and constraining the properties of its contributors. I will present the results of a new measurement of anisotropies in the diffuse gamma-ray background with the Fermi Large Area Telescope. I will then discuss an interpretation of these results in terms of gamma-ray source population properties, as well as the implications for a possible signal from the annihilation or decay of dark matter particles.
mardi 15 mars 2016 - 11:15
Salle 281, Institut d'Astrophysique
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